Square Calculator

Calculation of the values of a square (a regular quadrilateral). A square is a quadrilateral with four right angles and four sides of equal length. Enter one of the known values . Then click “Calculate”.


Square Calculator

Side length (a)
Diagonal (D)
Perimeter (p)
Square (S)
The radius of the circumscribed circle (R)
Radius of the inscribed circle (r)


d = √2 * a
p = 4 * a
S= a²
R = a / √2
r = a / 2
All angles are 90°, 2 diagonals.

S is the area, p is the perimeter
The sides are equal and the angles are 90 degrees
Diagonals = bisectors
Lines dividing the sides in half
Inscribed and circumscribed circle